newlib/libc/sys/mmixware/close.c


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/* close for MMIXware.

   Copyright (C) 2001 Hans-Peter Nilsson.
   Permission to use, copy, modify, and distribute this software is freely
   granted, provided that this notice is preserved with no changes.
   THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
   IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   PURPOSE.  */

#include <_ansi.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "sys/syscall.h"
#include <errno.h>

int
_close (int file)
{
  if ((unsigned int) file >= N_MMIX_FILEHANDLES
      || _MMIX_allocated_filehandle[file] == 0)
    {
      errno = EBADF;
      return -1;
    }

  _MMIX_allocated_filehandle[file] = 0;

  if (TRAP1f (SYS_Fclose, file) != 0)
    {
      errno = EIO;
      return -1;
    }
  return 0;
}